16c00db4bb
Pull AFS fixes from David Howells:
"Here's a set of patches that fix a number of bugs in the in-kernel AFS
client, including:
- Fix directory locking to not use individual page locks for
directory reading/scanning but rather to use a semaphore on the
afs_vnode struct as the directory contents must be read in a single
blob and data from different reads must not be mixed as the entire
contents may be shuffled about between reads.
- Fix address list parsing to handle port specifiers correctly.
- Only give up callback records on a server if we actually talked to
that server (we might not be able to access a server).
- Fix some callback handling bugs, including refcounting,
whole-volume callbacks and when callbacks actually get broken in
response to a CB.CallBack op.
- Fix some server/address rotation bugs, including giving up if we
can't probe a server; giving up if a server says it doesn't have a
volume, but there are more servers to try.
- Fix the decoding of fetched statuses to be OpenAFS compatible.
- Fix the handling of server lookups in Cache Manager ops (such as
CB.InitCallBackState3) to use a UUID if possible and to handle no
server being found.
- Fix a bug in server lookup where not all addresses are compared.
- Fix the non-encryption of calls that prevents some servers from
being accessed (this also requires an AF_RXRPC patch that has
already gone in through the net tree).
There's also a patch that adds tracepoints to log Cache Manager ops
that don't find a matching server, either by UUID or by address"
* tag 'afs-fixes-20180514' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
afs: Fix the non-encryption of calls
afs: Fix CB.CallBack handling
afs: Fix whole-volume callback handling
afs: Fix afs_find_server search loop
afs: Fix the handling of an unfound server in CM operations
afs: Add a tracepoint to record callbacks from unlisted servers
afs: Fix the handling of CB.InitCallBackState3 to find the server by UUID
afs: Fix VNOVOL handling in address rotation
afs: Fix AFSFetchStatus decoder to provide OpenAFS compatibility
afs: Fix server rotation's handling of fileserver probe failure
afs: Fix refcounting in callback registration
afs: Fix giving up callbacks on server destruction
afs: Fix address list parsing
afs: Fix directory page locking
64 lines
1.4 KiB
C
64 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/compiler.h>
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#include <sys/types.h>
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#include <regex.h>
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struct arm64_annotate {
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regex_t call_insn,
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jump_insn;
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};
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static struct ins_ops *arm64__associate_instruction_ops(struct arch *arch, const char *name)
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{
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struct arm64_annotate *arm = arch->priv;
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struct ins_ops *ops;
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regmatch_t match[2];
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if (!regexec(&arm->jump_insn, name, 2, match, 0))
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ops = &jump_ops;
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else if (!regexec(&arm->call_insn, name, 2, match, 0))
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ops = &call_ops;
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else if (!strcmp(name, "ret"))
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ops = &ret_ops;
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else
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return NULL;
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arch__associate_ins_ops(arch, name, ops);
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return ops;
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}
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static int arm64__annotate_init(struct arch *arch, char *cpuid __maybe_unused)
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{
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struct arm64_annotate *arm;
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int err;
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if (arch->initialized)
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return 0;
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arm = zalloc(sizeof(*arm));
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if (!arm)
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return -1;
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/* bl, blr */
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err = regcomp(&arm->call_insn, "^blr?$", REG_EXTENDED);
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if (err)
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goto out_free_arm;
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/* b, b.cond, br, cbz/cbnz, tbz/tbnz */
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err = regcomp(&arm->jump_insn, "^[ct]?br?\\.?(cc|cs|eq|ge|gt|hi|le|ls|lt|mi|ne|pl)?n?z?$",
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REG_EXTENDED);
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if (err)
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goto out_free_call;
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arch->initialized = true;
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arch->priv = arm;
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arch->associate_instruction_ops = arm64__associate_instruction_ops;
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arch->objdump.comment_char = '/';
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arch->objdump.skip_functions_char = '+';
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return 0;
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out_free_call:
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regfree(&arm->call_insn);
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out_free_arm:
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free(arm);
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return -1;
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}
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